【摘要】 地震子波频率概念的合理选择与准确应用对于地震采集设计、地震模拟研究、地震资料处理、地震属性分析以及质量评价等是非常重要的。针对目前地震子波频率由于定义方式出现的各种概念(视频率、主频、峰值频率、中心频率等)以及理解上出现的偏差等问题,首先从时间域定义和频率域定义2个方面进行了归纳和总结, 并在此基础上对3种常用地震子波(Ricker子波,Zinc子波,正弦指数衰减子波)进行了分析和研究,得出视频率与主频概念一致,但不同地震子波的峰值频率、中心频率和视频率(或主频)之间并不完全一致的结论;而对于实际地震资料,将峰值频率近似看作地震子波的主频是可以的,但在地震子波已知的情形下这样做是不恰当的,甚至可能会得出错误的结论和认识。更多还原

【Abstract】 It is very important to choose accurately seismic wavelet frequency for seismic acquisition parameter design, seismic forward modeling, seismic data processing, seismic attribution analysis, seismic data appreciation etc. The issues of present seismic wavelet frequency caused by different concepts, such as apparent frequency, dominant frequency, peak frequency and centroid frequency, etc. , which are defined by different methods, and understanding deviation. definition of seismic wavelet frequency for time and frequency domain are concluded and summarized. On this basis, three kinds of seismic wavelets in common use such as Ricker and Zinc wavelets as well as sine wavelet with exponential attenuation characteristics are analyzed and a conclude is achieved that apparent frequency and dominant frequency are consistent in essence, but peak frequency and centroid frequency as well as apparent frequency or dominant frequency are not completely consistent with different seismic wavelets. For actual seismic data, peak frequency can approximately be used as dominant frequency, but it is not suitable when seismic wavelet is known for it can give out any wrong knowledge and results.更多还原